Try removing the battery and diconnecting the power supply. Leave the laptop like this for a couple of minutes. If the battery was charged, put just the battery in and try to boot the laptop. If that fails, remove the battery, plug it in to the power supply, and try to boot it up.

Try removing the battery and diconnecting the power supply. Leave the laptop like this for a couple of minutes. If the battery was charged, put just the battery in and try to boot the laptop. If that fails, remove the battery, plug it in to the power supply, and try to boot it up.